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Status of RF Group HZB (former BESSY)

Status of RF Group HZB (former BESSY). Wolfgang Anders. Outline: BESSY + HMI = HZB Low level Klystrons ~ 80.000 h HV part burned IOT instabilities RF leakage on klystron. Outline. HMI + BESSY = HZB. Berlin. HZB.

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Status of RF Group HZB (former BESSY)

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  1. Status of RF Group HZB (former BESSY) Wolfgang Anders

  2. Outline: BESSY + HMI = HZB Low level Klystrons ~ 80.000 h HV part burned IOT instabilities RF leakage on klystron Outline

  3. HMI + BESSY = HZB Berlin

  4. HZB

  5. Low α optic, tera hertz radiation and infrared users are limited by the noise of the transmitters. We are now evaluating, if we need new low level system New master clock R&S SMA 100A with frequency resolution of 0.01 Hz for more precise horizontal orbit correction Noise at master clock ~ 70 fs  after 200 m cable ~ 500 fs Low level

  6. 80.000 h klystrons 3 of 4 klystrons at BESSY II have operating time of ~ 80.000 h now Coaxial switch at the 75 kW RF line To be prepared in case of problems, we install a high power coaxial switch with load at each transmitter.

  7. HV PS defekts Broken brass rod at HV transformator Burned part in HV PS

  8. IOT instabilities • Last year I reported on IOT phase/amplitude instabilities on E2V and CPI IOT • Planned measurements for near future: • Measurements at Thales IOT 1.3 GHz • Repeat measurements after 1 year of operation on CPI 80 kW 500 MHz IOT at MLS • Mesurements on CPI klystron

  9. Curios: energy saving lamp RF leakage at 10 kW 1.3 GHz klystron  Operating a neon lamp „without energy“ at RF field of 15 V/m in air .

  10. Thank You

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